(Fix) The brightness becomes maximum at the start of Windows XP even if the maximum brightness has not been set with Fn+End key in previous session. (BIOS)

http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-67982

当你更换为Windows XP系统后，即使你没有设置开机显示亮度，系统默认会选择最大亮度。